1 /* vi: set sw=4 ts=4: */
3 * Mini tar implementation for busybox
5 * Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg
6 * Glenn McGrath <bug1@iinet.net.au>
8 * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
9 * ground up. It still has remnants of the old code lying about, but it is
10 * very different now (i.e., cleaner, less global variables, etc.)
12 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
14 * Based in part in the tar implementation in sash
15 * Copyright (c) 1999 by David I. Bell
16 * Permission is granted to use, distribute, or modify this source,
17 * provided that this copyright notice remains intact.
18 * Permission to distribute sash derived code under the GPL has been granted.
20 * Based in part on the tar implementation from busybox-0.28
21 * Copyright (C) 1995 Bruce Perens
22 * This is free software under the GNU General Public License.
24 * This program is free software; you can redistribute it and/or modify
25 * it under the terms of the GNU General Public License as published by
26 * the Free Software Foundation; either version 2 of the License, or
27 * (at your option) any later version.
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 * General Public License for more details.
34 * You should have received a copy of the GNU General Public License
35 * along with this program; if not, write to the Free Software
36 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
51 #include <sys/socket.h>
52 #include "unarchive.h"
55 #ifdef CONFIG_FEATURE_TAR_CREATE
57 /* Tar file constants */
58 # define TAR_MAGIC "ustar" /* ustar and a null */
59 # define TAR_VERSION " " /* Be compatable with GNU tar format */
62 # define MAJOR(dev) (((dev)>>8)&0xff)
63 # define MINOR(dev) ((dev)&0xff)
66 static const int TAR_BLOCK_SIZE = 512;
67 static const int TAR_MAGIC_LEN = 6;
68 static const int TAR_VERSION_LEN = 2;
70 /* POSIX tar Header Block, from POSIX 1003.1-1990 */
71 enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
72 struct TarHeader { /* byte offset */
73 char name[NAME_SIZE]; /* 0-99 */
74 char mode[8]; /* 100-107 */
75 char uid[8]; /* 108-115 */
76 char gid[8]; /* 116-123 */
77 char size[12]; /* 124-135 */
78 char mtime[12]; /* 136-147 */
79 char chksum[8]; /* 148-155 */
80 char typeflag; /* 156-156 */
81 char linkname[NAME_SIZE]; /* 157-256 */
82 char magic[6]; /* 257-262 */
83 char version[2]; /* 263-264 */
84 char uname[32]; /* 265-296 */
85 char gname[32]; /* 297-328 */
86 char devmajor[8]; /* 329-336 */
87 char devminor[8]; /* 337-344 */
88 char prefix[155]; /* 345-499 */
89 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
91 typedef struct TarHeader TarHeader;
94 ** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
95 ** the only functions that deal with the HardLinkInfo structure.
96 ** Even these functions use the xxxHardLinkInfo() functions.
98 typedef struct HardLinkInfo HardLinkInfo;
100 HardLinkInfo *next; /* Next entry in list */
101 dev_t dev; /* Device number */
102 ino_t ino; /* Inode number */
103 short linkCount; /* (Hard) Link Count */
104 char name[1]; /* Start of filename (must be last) */
107 /* Some info to be carried along when creating a new tarball */
109 char *fileName; /* File name of the tarball */
110 int tarFd; /* Open-for-write file descriptor
112 struct stat statBuf; /* Stat info for the tarball, letting
113 us know the inode and device that the
114 tarball lives, so we can avoid trying
115 to include the tarball into itself */
116 int verboseFlag; /* Whether to print extra stuff or not */
117 const llist_t *excludeList; /* List of files to not include */
118 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
119 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
121 typedef struct TarBallInfo TarBallInfo;
123 /* A nice enum with all the possible tar file content types */
125 REGTYPE = '0', /* regular file */
126 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
127 LNKTYPE = '1', /* hard link */
128 SYMTYPE = '2', /* symbolic link */
129 CHRTYPE = '3', /* character special */
130 BLKTYPE = '4', /* block special */
131 DIRTYPE = '5', /* directory */
132 FIFOTYPE = '6', /* FIFO special */
133 CONTTYPE = '7', /* reserved */
134 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
135 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
137 typedef enum TarFileType TarFileType;
139 /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
140 static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
141 struct stat *statbuf,
144 /* Note: hlInfoHeadPtr can never be NULL! */
145 HardLinkInfo *hlInfo;
147 hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
148 hlInfo->next = *hlInfoHeadPtr;
149 *hlInfoHeadPtr = hlInfo;
150 hlInfo->dev = statbuf->st_dev;
151 hlInfo->ino = statbuf->st_ino;
152 hlInfo->linkCount = statbuf->st_nlink;
153 strcpy(hlInfo->name, name);
156 static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
158 HardLinkInfo *hlInfo = NULL;
159 HardLinkInfo *hlInfoNext = NULL;
162 hlInfo = *hlInfoHeadPtr;
164 hlInfoNext = hlInfo->next;
168 *hlInfoHeadPtr = NULL;
173 /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
174 static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
177 if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
179 hlInfo = hlInfo->next;
184 /* Put an octal string into the specified buffer.
185 * The number is zero and space padded and possibly null padded.
186 * Returns TRUE if successful. */
187 static int putOctal(char *cp, int len, long value)
191 char *tempString = tempBuffer;
193 /* Create a string of the specified length with an initial space,
194 * leading zeroes and the octal number, and a trailing null. */
195 sprintf(tempString, "%0*lo", len - 1, value);
197 /* If the string is too large, suppress the leading space. */
198 tempLength = strlen(tempString) + 1;
199 if (tempLength > len) {
204 /* If the string is still too large, suppress the trailing null. */
205 if (tempLength > len)
208 /* If the string is still too large, fail. */
209 if (tempLength > len)
212 /* Copy the string to the field. */
213 memcpy(cp, tempString, len);
218 /* Write out a tar header for the specified file/directory/whatever */
219 static inline int writeTarHeader(struct TarBallInfo *tbInfo,
220 const char *header_name,
221 const char *real_name, struct stat *statbuf)
224 struct TarHeader header;
225 const unsigned char *cp = (const unsigned char *) &header;
226 ssize_t size = sizeof(struct TarHeader);
228 memset(&header, 0, size);
230 strncpy(header.name, header_name, sizeof(header.name));
232 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
233 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
234 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
235 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
236 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
237 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
238 TAR_MAGIC_LEN + TAR_VERSION_LEN);
240 /* Enter the user and group names (default to root if it fails) */
241 if (my_getpwuid(header.uname, statbuf->st_uid) == NULL)
242 strcpy(header.uname, "root");
243 if (my_getgrgid(header.gname, statbuf->st_gid) == NULL)
244 strcpy(header.gname, "root");
246 if (tbInfo->hlInfo) {
247 /* This is a hard link */
248 header.typeflag = LNKTYPE;
249 strncpy(header.linkname, tbInfo->hlInfo->name,
250 sizeof(header.linkname));
251 } else if (S_ISLNK(statbuf->st_mode)) {
252 char *lpath = xreadlink(real_name);
254 if (!lpath) /* Already printed err msg inside xreadlink() */
256 header.typeflag = SYMTYPE;
257 strncpy(header.linkname, lpath, sizeof(header.linkname));
259 } else if (S_ISDIR(statbuf->st_mode)) {
260 header.typeflag = DIRTYPE;
261 strncat(header.name, "/", sizeof(header.name));
262 } else if (S_ISCHR(statbuf->st_mode)) {
263 header.typeflag = CHRTYPE;
264 putOctal(header.devmajor, sizeof(header.devmajor),
265 MAJOR(statbuf->st_rdev));
266 putOctal(header.devminor, sizeof(header.devminor),
267 MINOR(statbuf->st_rdev));
268 } else if (S_ISBLK(statbuf->st_mode)) {
269 header.typeflag = BLKTYPE;
270 putOctal(header.devmajor, sizeof(header.devmajor),
271 MAJOR(statbuf->st_rdev));
272 putOctal(header.devminor, sizeof(header.devminor),
273 MINOR(statbuf->st_rdev));
274 } else if (S_ISFIFO(statbuf->st_mode)) {
275 header.typeflag = FIFOTYPE;
276 } else if (S_ISREG(statbuf->st_mode)) {
277 header.typeflag = REGTYPE;
278 putOctal(header.size, sizeof(header.size), statbuf->st_size);
280 bb_error_msg("%s: Unknown file type", real_name);
284 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
285 * the header). The checksum field must be filled with blanks for the
286 * calculation. The checksum field is formatted differently from the
287 * other fields: it has [6] digits, a null, then a space -- rather than
288 * digits, followed by a null like the other fields... */
289 memset(header.chksum, ' ', sizeof(header.chksum));
290 cp = (const unsigned char *) &header;
293 putOctal(header.chksum, 7, chksum);
295 /* Now write the header out to disk */
297 bb_full_write(tbInfo->tarFd, (char *) &header,
298 sizeof(struct TarHeader))) < 0) {
299 bb_error_msg(bb_msg_io_error, real_name);
302 /* Pad the header up to the tar block size */
303 for (; size < TAR_BLOCK_SIZE; size++) {
304 write(tbInfo->tarFd, "\0", 1);
306 /* Now do the verbose thing (or not) */
308 if (tbInfo->verboseFlag) {
311 if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
314 fprintf(vbFd, "%s\n", header.name);
320 # ifdef CONFIG_FEATURE_TAR_FROM
321 static inline int exclude_file(const llist_t *excluded_files, const char *file)
323 while (excluded_files) {
324 if (excluded_files->data[0] == '/') {
325 if (fnmatch(excluded_files->data, file,
326 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
331 for (p = file; p[0] != '\0'; p++) {
332 if ((p == file || p[-1] == '/') && p[0] != '/' &&
333 fnmatch(excluded_files->data, p,
334 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
338 excluded_files = excluded_files->link;
345 static int writeFileToTarball(const char *fileName, struct stat *statbuf,
348 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
349 const char *header_name;
352 ** Check to see if we are dealing with a hard link.
354 ** Treat the first occurance of a given dev/inode as a file while
355 ** treating any additional occurances as hard links. This is done
356 ** by adding the file information to the HardLinkInfo linked list.
358 tbInfo->hlInfo = NULL;
359 if (statbuf->st_nlink > 1) {
360 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
361 if (tbInfo->hlInfo == NULL)
362 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
365 /* It is against the rules to archive a socket */
366 if (S_ISSOCK(statbuf->st_mode)) {
367 bb_error_msg("%s: socket ignored", fileName);
371 /* It is a bad idea to store the archive we are in the process of creating,
372 * so check the device and inode to be sure that this particular file isn't
374 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
375 tbInfo->statBuf.st_ino == statbuf->st_ino) {
376 bb_error_msg("%s: file is the archive; skipping", fileName);
380 header_name = fileName;
381 while (header_name[0] == '/') {
382 static int alreadyWarned = FALSE;
384 if (alreadyWarned == FALSE) {
385 bb_error_msg("Removing leading '/' from member names");
386 alreadyWarned = TRUE;
391 if (strlen(fileName) >= NAME_SIZE) {
392 bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
396 if (header_name[0] == '\0')
399 # ifdef CONFIG_FEATURE_TAR_FROM
400 if (exclude_file(tbInfo->excludeList, header_name)) {
403 # endif /* CONFIG_FEATURE_TAR_FROM */
405 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
409 /* Now, if the file is a regular file, copy it out to the tarball */
410 if ((tbInfo->hlInfo == NULL)
411 && (S_ISREG(statbuf->st_mode))) {
413 ssize_t readSize = 0;
415 /* open the file we want to archive, and make sure all is well */
416 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
417 bb_perror_msg("%s: Cannot open", fileName);
421 /* write the file to the archive */
422 readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd);
424 /* Pad the file up to the tar block size */
425 for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++) {
426 write(tbInfo->tarFd, "\0", 1);
434 static inline int writeTarFile(const int tar_fd, const int verboseFlag,
435 const unsigned long dereferenceFlag, const llist_t *include,
436 const llist_t *exclude, const int gzip)
438 #ifdef CONFIG_FEATURE_TAR_GZIP
439 int gzipDataPipe[2] = { -1, -1 };
440 int gzipStatusPipe[2] = { -1, -1 };
442 volatile int vfork_exec_errno = 0;
445 int errorFlag = FALSE;
447 struct TarBallInfo tbInfo;
449 tbInfo.hlInfoHead = NULL;
451 fchmod(tar_fd, 0644);
452 tbInfo.tarFd = tar_fd;
453 tbInfo.verboseFlag = verboseFlag;
455 /* Store the stat info for the tarball's file, so
456 * can avoid including the tarball into itself.... */
457 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
458 bb_perror_msg_and_die("Couldnt stat tar file");
460 #ifdef CONFIG_FEATURE_TAR_GZIP
462 if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) {
463 bb_perror_msg_and_die("Failed to create gzip pipe");
466 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
469 /* Avoid vfork clobbering */
477 dup2(gzipDataPipe[0], 0);
478 close(gzipDataPipe[1]);
480 if (tbInfo.tarFd != 1)
481 dup2(tbInfo.tarFd, 1);
483 close(gzipStatusPipe[0]);
484 fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */
486 execl("/bin/gzip", "gzip", "-f", 0);
487 vfork_exec_errno = errno;
489 close(gzipStatusPipe[1]);
491 } else if (gzipPid > 0) {
492 close(gzipDataPipe[0]);
493 close(gzipStatusPipe[1]);
498 int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
500 if (n == 0 && vfork_exec_errno != 0) {
501 errno = vfork_exec_errno;
502 bb_perror_msg_and_die("Could not exec gzip process");
503 } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
504 continue; /* try it again */
507 close(gzipStatusPipe[0]);
509 tbInfo.tarFd = gzipDataPipe[1];
511 bb_perror_msg_and_die("Failed to vfork gzip process");
516 tbInfo.excludeList = exclude;
518 /* Read the directory/files and iterate over them one at a time */
520 if (!recursive_action(include->data, TRUE, dereferenceFlag, FALSE,
521 writeFileToTarball, writeFileToTarball,
525 include = include->link;
527 /* Write two empty blocks to the end of the archive */
528 for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++) {
529 write(tbInfo.tarFd, "\0", 1);
532 /* To be pedantically correct, we would check if the tarball
533 * is smaller than 20 tar blocks, and pad it if it was smaller,
534 * but that isn't necessary for GNU tar interoperability, and
535 * so is considered a waste of space */
537 /* Hang up the tools, close up shop, head home */
540 bb_error_msg("Error exit delayed from previous errors");
542 freeHardLinkInfo(&tbInfo.hlInfoHead);
544 #ifdef CONFIG_FEATURE_TAR_GZIP
545 if (gzip && gzipPid) {
546 if (waitpid(gzipPid, NULL, 0) == -1)
547 printf("Couldnt wait ?");
553 #endif /* tar_create */
555 #ifdef CONFIG_FEATURE_TAR_FROM
556 static llist_t *append_file_list_to_list(llist_t *list)
562 llist_t *newlist = NULL;
565 src_stream = bb_xfopen(cur->data, "r");
569 while((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
570 newlist = llist_add_to(newlist, line);
578 #ifdef CONFIG_FEATURE_TAR_COMPRESS
579 static char get_header_tar_Z(archive_handle_t *archive_handle)
581 /* Cant lseek over pipe's */
582 archive_handle->seek = seek_by_char;
584 /* do the decompression, and cleanup */
585 if ((bb_xread_char(archive_handle->src_fd) != 0x1f) || (bb_xread_char(archive_handle->src_fd) != 0x9d)) {
586 bb_error_msg_and_die("Invalid magic");
589 archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
590 archive_handle->offset = 0;
591 while (get_header_tar(archive_handle) == EXIT_SUCCESS);
593 /* Can only do one file at a time */
594 return(EXIT_FAILURE);
598 #define CTX_TEST (1 << 0)
599 #define CTX_EXTRACT (1 << 1)
600 #define TAR_OPT_BASEDIR (1 << 2)
601 #define TAR_OPT_TARNAME (1 << 3)
602 #define TAR_OPT_2STDOUT (1 << 4)
603 #define TAR_OPT_P (1 << 5)
604 #define TAR_OPT_VERBOSE (1 << 6)
605 #define TAR_OPT_KEEP_OLD (1 << 7)
607 #ifdef CONFIG_FEATURE_TAR_CREATE
608 # define CTX_CREATE (1 << 8)
609 # define TAR_OPT_DEREFERNCE (1 << 9)
610 # define TAR_OPT_STR_CREATE "ch"
611 # define TAR_OPT_FLAG_CREATE 2
613 //# define CTX_CREATE 0
614 # define TAR_OPT_STR_CREATE ""
615 # define TAR_OPT_FLAG_CREATE 0
618 #ifdef CONFIG_FEATURE_TAR_BZIP2
619 # define TAR_OPT_BZIP2 (1 << (8 + TAR_OPT_FLAG_CREATE))
620 # define TAR_OPT_STR_BZIP2 "j"
621 # define TAR_OPT_FLAG_BZIP2 1
623 # define TAR_OPT_STR_BZIP2 ""
624 # define TAR_OPT_FLAG_BZIP2 0
627 #ifdef CONFIG_FEATURE_TAR_FROM
628 # define TAR_OPT_INCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2))
629 # define TAR_OPT_EXCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + 1))
630 # define TAR_OPT_STR_FROM "T:X:"
631 # define TAR_OPT_FLAG_FROM 2
633 # define TAR_OPT_STR_FROM ""
634 # define TAR_OPT_FLAG_FROM 0
637 #ifdef CONFIG_FEATURE_TAR_GZIP
638 # define TAR_OPT_GZIP (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM))
639 # define TAR_OPT_STR_GZIP "z"
640 # define TAR_OPT_FLAG_GZIP 1
642 # define TAR_OPT_STR_GZIP ""
643 # define TAR_OPT_FLAG_GZIP 0
646 #ifdef CONFIG_FEATURE_TAR_COMPRESS
647 # define TAR_OPT_UNCOMPRESS (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM + TAR_OPT_FLAG_GZIP))
648 # define TAR_OPT_STR_COMPRESS "Z"
650 # define TAR_OPT_STR_COMPRESS ""
653 static const char tar_options[]="txC:f:Opvk" \
658 TAR_OPT_STR_COMPRESS;
660 #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
661 static const struct option tar_long_options[] = {
662 { "list", 0, NULL, 't' },
663 { "extract", 0, NULL, 'x' },
664 { "directory", 1, NULL, 'C' },
665 { "file", 1, NULL, 'f' },
666 { "to-stdout", 0, NULL, 'O' },
667 { "same-permissions", 0, NULL, 'p' },
668 { "verbose", 0, NULL, 'v' },
669 { "keep-old", 0, NULL, 'k' },
670 # ifdef CONFIG_FEATURE_TAR_CREATE
671 { "create", 0, NULL, 'c' },
672 { "dereference", 0, NULL, 'h' },
674 # ifdef CONFIG_FEATURE_TAR_BZIP2
675 { "bzip2", 0, NULL, 'j' },
677 # ifdef CONFIG_FEATURE_TAR_FROM
678 { "files-from", 1, NULL, 'T' },
679 { "exclude-from", 1, NULL, 'X' },
681 # ifdef CONFIG_FEATURE_TAR_GZIP
682 { "gzip", 0, NULL, 'z' },
684 # ifdef CONFIG_FEATURE_TAR_COMPRESS
685 { "compress", 0, NULL, 'Z' },
691 int tar_main(int argc, char **argv)
693 char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
694 archive_handle_t *tar_handle;
695 char *base_dir = NULL;
696 const char *tar_filename = "-";
698 unsigned long ctx_flag = 0;
704 /* Prepend '-' to the first argument if required */
705 if (argv[1][0] != '-') {
708 bb_xasprintf(&tmp, "-%s", argv[1]);
712 /* Initialise default values */
713 tar_handle = init_handle();
714 tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE | ARCHIVE_EXTRACT_UNCONDITIONAL;
716 bb_opt_complementaly = "c~tx:t~cx:x~ct:X*:T*";
717 #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
718 bb_applet_long_options = tar_long_options;
721 opt = bb_getopt_ulflags(argc, argv, tar_options,
722 &base_dir, /* Change to dir <optarg> */
723 &tar_filename /* archive filename */
724 #ifdef CONFIG_FEATURE_TAR_FROM
725 , &(tar_handle->accept),
726 &(tar_handle->reject)
730 /* Check one and only one context option was given */
731 if(opt & 0x80000000UL) {
734 #ifdef CONFIG_FEATURE_TAR_CREATE
735 ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT);
737 ctx_flag = opt & (CTX_TEST | CTX_EXTRACT);
742 if(ctx_flag & CTX_TEST) {
743 if ((tar_handle->action_header == header_list) ||
744 (tar_handle->action_header == header_verbose_list)) {
745 tar_handle->action_header = header_verbose_list;
747 tar_handle->action_header = header_list;
750 if(ctx_flag & CTX_EXTRACT) {
751 if (tar_handle->action_data != data_extract_to_stdout)
752 tar_handle->action_data = data_extract_all;
754 if(opt & TAR_OPT_2STDOUT) {
756 tar_handle->action_data = data_extract_to_stdout;
758 if(opt & TAR_OPT_VERBOSE) {
759 if ((tar_handle->action_header == header_list) ||
760 (tar_handle->action_header == header_verbose_list))
762 tar_handle->action_header = header_verbose_list;
764 tar_handle->action_header = header_list;
767 if (opt & TAR_OPT_KEEP_OLD) {
768 tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
771 #ifdef CONFIG_FEATURE_TAR_GZIP
772 if(opt & TAR_OPT_GZIP) {
773 get_header_ptr = get_header_tar_gz;
776 #ifdef CONFIG_FEATURE_TAR_BZIP2
777 if(opt & TAR_OPT_BZIP2) {
778 get_header_ptr = get_header_tar_bz2;
781 #ifdef CONFIG_FEATURE_TAR_COMPRESS
782 if(opt & TAR_OPT_UNCOMPRESS) {
783 get_header_ptr = get_header_tar_Z;
786 #ifdef CONFIG_FEATURE_TAR_FROM
787 if(opt & TAR_OPT_EXCLUDE_FROM) {
788 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
790 if(opt & TAR_OPT_INCLUDE_FROM) {
791 tar_handle->accept = append_file_list_to_list(tar_handle->accept);
795 /* Check if we are reading from stdin */
796 if ((argv[optind]) && (*argv[optind] == '-')) {
797 /* Default is to read from stdin, so just skip to next arg */
801 /* Setup an array of filenames to work with */
802 /* TODO: This is the same as in ar, separate function ? */
803 while (optind < argc) {
804 char *filename_ptr = last_char_is(argv[optind], '/');
806 *filename_ptr = '\0';
808 tar_handle->accept = llist_add_to(tar_handle->accept, argv[optind]);
812 if ((tar_handle->accept) || (tar_handle->reject)) {
813 tar_handle->filter = filter_accept_reject_list;
816 /* Open the tar file */
821 #ifdef CONFIG_FEATURE_TAR_CREATE
822 if (opt & CTX_CREATE) {
823 /* Make sure there is at least one file to tar up. */
824 if (tar_handle->accept == NULL) {
825 bb_error_msg_and_die("Cowardly refusing to create an empty archive");
828 flags = O_WRONLY | O_CREAT | O_EXCL;
829 unlink(tar_filename);
837 if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
838 tar_handle->src_fd = fileno(tar_stream);
839 tar_handle->seek = seek_by_char;
841 tar_handle->src_fd = bb_xopen(tar_filename, flags);
845 if ((base_dir) && (chdir(base_dir))) {
846 bb_perror_msg_and_die("Couldnt chdir to %s", base_dir);
849 #ifdef CONFIG_FEATURE_TAR_CREATE
850 /* create an archive */
851 if (opt & CTX_CREATE) {
852 int verboseFlag = FALSE;
853 int gzipFlag = FALSE;
855 # ifdef CONFIG_FEATURE_TAR_GZIP
856 if (get_header_ptr == get_header_tar_gz) {
859 # endif /* CONFIG_FEATURE_TAR_GZIP */
860 # ifdef CONFIG_FEATURE_TAR_BZIP2
861 if (get_header_ptr == get_header_tar_bz2) {
862 bb_error_msg_and_die("Creating bzip2 compressed archives is not currently supported.");
864 # endif /* CONFIG_FEATURE_TAR_BZIP2 */
866 if ((tar_handle->action_header == header_list) ||
867 (tar_handle->action_header == header_verbose_list)) {
870 writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERNCE, tar_handle->accept,
871 tar_handle->reject, gzipFlag);
873 #endif /* CONFIG_FEATURE_TAR_CREATE */
875 while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
877 /* Ckeck that every file that should have been extracted was */
878 while (tar_handle->accept) {
879 if (find_list_entry(tar_handle->reject, tar_handle->accept->data) == NULL) {
880 if (find_list_entry(tar_handle->passed, tar_handle->accept->data) == NULL) {
881 bb_error_msg_and_die("%s: Not found in archive\n", tar_handle->accept->data);
884 tar_handle->accept = tar_handle->accept->link;
888 #ifdef CONFIG_FEATURE_CLEAN_UP
889 if (tar_handle->src_fd != STDIN_FILENO) {
890 close(tar_handle->src_fd);
892 #endif /* CONFIG_FEATURE_CLEAN_UP */
894 return(EXIT_SUCCESS);